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We finally had some clear weather, which I used to get a measurement of
Parallactic Retardation. George's phenomenon cut the moon's apparent motion
to about three quarters of her geocentric motion.

Over a period of a little over an hour I took three sets, five contacts each,
of the moon's near limb and Pollux. The moon was so high I had to lie on my
back, and was within two degrees of the meridian for the last set. By then it
was late, so I called it quits. The first set missed GMT by 54 seconds. The
second missed by 14 seconds. The third missed by 49 seconds. All three slow.

If anyone would like to look at the sextant readings and watch times I'll
post them. Just bear in mind that I have to look through a four power scope
with trifocals, and have the beginnings of cataracts.

By the way, I like the name "Parallactic Retardation." It's the phenomenon
itself that I don't like.

Bruce

   

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